Skyborn
Home
PULL · 17 JUL 2011

This was
your sky.

Lewin's Challenge: 360 Degree Star Trails

NASA APOD · Peter Wienerroither (U. Wien)
COSMIC MESSAGE

This image from Vienna, Austria, shows 360-degree star trails, a digital trick. Real star trails from Earth's spin cannot complete a full circle in a single exposure because the sun would rise. The Earth's rotation makes the sky appear to rotate around us, creating these trails.

CREDIT
© COPYRIGHTED Peter Wienerroither (U. Wien) · Peter Wienerroither (U. Wien) · used by permission via NASA APOD · not for redistribution. · View source
Try another date
EXPORT AS
On paper
Take home a plate from the same week

We cannot put this date's photograph on paper at poster size. We can print the nearest public archive plate to your date instead.

See print sizes

From $29.00

SB-2011-07-17 ©
UNCOMMON
Lewin's Challenge: 360 Degree Star Trails
2011-07-17 · ♋
SKYBORN
Lewin's Challenge: 360 Degree Star Trails
NASA APOD · Peter Wienerroither (U. Wien)
BORN 5529 days ago
SKYBORN.APP

Move your cursor across the card to tilt it. Holographic foil ripples through the edges and surface as you go.

ZODIAC CONTEXT
♋
CANCER

In tropical astrology, 17 JUL 2011 falls under Cancer (♋). The sign's window runs from 06-21 through 07-22. Cancer is marked by the Beehive Cluster, M44, a loose family of stars visible to the naked eye on a dark night. The Sun was crossing this region of the sky on 17 JUL 2011.

THE ALMANAC FOR 17 JUL 2011
DAY
Sunday
MOON
Full moon, 97% lit
POSITION
Day 198 of 365
SAME DAY, OTHER YEARS
NEARBY DATES